Chord & FretCdim7 — diminished seventh
Notes on C: C – Eb – Gb – AFormula: 1 – b3 – b5 – bb7In the formula, the numbers count steps of the major scale starting from the note that names the chord; "b" lowers a half step, "#" raises one — and a slash names the bass note.
The diminished seventh stacks three minor thirds (1–b3–b5–bb7), forming a symmetrical and highly tense chord. It can stand in for a dominant with the root omitted.
The same chord on all four instruments
Where to use it: Between two neighbouring chords it acts as a half-step stair: in C → C#° → Dm it is the little step that pushes the music forward. In practice it is a passing chord — you barely notice it, but you feel the motion.
This is just one shape of Cdim7. In Chord & Fret, you hear every shape strummed string by string, in each instrument's own voice; open every variation on the neck, grouped by bass note; and change the tuning — the shape rewrites itself. Start free. Unlock everything with Pro. 100% offline.
Unlock in Chord & Fret →Part of the Sevenths family.